In recent decades, many credit unions began to resort to such form of service as Like the credit cooperatives, credit unions form associations of a higher level, which are called corporate credit unions. Is necessary that all shareholders of the credit union were members of a single community, would know each other well enough to enjoy mutual trust. The relationship of shareholders with credit union are not client-based, they are co-operative, based on different principles and standards, in particular, on the principles of the law of obligations. The relationship between credit unions and shareholders arise from the membership and are not customer relationship. Credit Union - a non-profit financial institution specialized in mutual financial assistance by providing savings and credit services to their members.